A Cary man has been charged with sexually assaulting five children he knows, including relatives, numerous times over a six-month period, according to police and jail records.

Michael S. Reck, 38, of the northwest suburb, is charged with having sex with children ages 4 to 14, “all related to or otherwise known” by Reck, according to a release from Cary Police. He was arrested today, Cary Police Chief Steven Casstevens said in an email.

Reck is being held in McHenry County Jail in lieu of $580,000 bail, pending a hearing Saturday morning in McHenry County, according to jail records. He faces charges of predatory criminal sexual assault, criminal sexual assault and criminal sexual abuse, according to police.

The attacks took place at Reck’s home over the last six months, police said.

“Police were notified of these alleged incidents on January 6, 2013 and immediately initiated an investigation,” according to the release.

Although investigators have identified five victims, both boys and girls, the investigation is continuing, and more charges tied to additional victims are possible, police said.